Kristen Stewart and Robert Pattinson split: She's "given up on winning him back"

Kristen Stewart has been left devastated by Robert Pattinson's decision to call it quits on their relationship. Despite wishing things could be different, the actress is apparently trying to accept the fact that they are over - for good.

Kristen Stewart has reportedly been trying to accept that her relationship with Robert Pattinson is not salvageable.

Though she's feeling completely destroyed by the split, Kristen has realised that they aren't going to be able to make it work ever again.

A source told Hollywood Life: “She pretty much knows that at this point there is nothing she can do to win him back.”

After dealing with Kristen's infidelity, Rob eventually called it quits after reportedly seeing messages from Rupert Sanders on her phone recently.

The Twilight couple had been working hard on making it work after their split last summer, but Rob apparently just couldn't get past the fact Kristen cheated on him with director Rupert.

But now it's Kristen's turn to suffer.​The source added: "She misses him terribly.

“She misses her best friend. It’s like a part of her has died and she is still going through the grieving process.”